	var oL = document.querySelector("ol");
	var aLi = document.querySelectorAll("li");
	var oLi = document.querySelector(".item");

	aLi[2].onclick = function () {
	  if (oL.style.display == "none") {
	    oL.style.display = "block";
	  } else {
	    oL.style.display = "none";
	  }
	}